JPS6043083A - Direct generating evaporator of lng - Google Patents

Abstract

PURPOSE:To directly generate by bonding a thermoelectric generating element to the heat transfer surface outside an open rack vaporizer for LNG, thereby recovering the low temperature heat of the LNG as electric power. CONSTITUTION:A thermoelectric generating element 15 is bonded to the heat transfer surface 18 at the outside of an LNG open rack vaporizer. In the structure, the LNG fed to the lower header 16 of the vaporizer rises in the open vaporizer, and the surface 18 receivers heat from sea water, the LNG is vaporized to be outputted as natural gas from the upper header 17. Water is scattered to the surface 18 at the outside of the vaporizer, and the sea water is flowed to the membrane. The temperature of the sea water side is ambient temperature, the LGN inside the vaporizer is the lowest temperature at approx. -160 deg.C, and the element 15 generates an electricity due to the temperature difference.

Description

Detailed Description of the Invention The main feature of the present invention is +n), direct power generation of LNG λ(1'
Tone it to H x 3.

Generally, I, NG are LNG Ili' r or 2j1 (
QL using i'' Yakusui open rack vaporizer on the ground
(It is heated and sent to the consumer. However, in that case, the sea water is simply cooled instead of LNG or 4, and the low temperature air of LNG is used by Raku. .

For this reason, the temperature difference between the low-temperature heat of vaporization of LNG and seawater is reduced to 4u.
The method of making 48 Ichigo 1 number of Sekis and collecting them as gravity has begun to be practiced. There are many heat engines currently in use, but they are all basically Rankine cycle. Therefore, compared to the IIQ 4ITFT, which uses a simple oven rack vaporizer that does not recover electricity, As the number of equipment such as turbines, pumps, heat exchangers, and diagnostic equipment increases, and the number of equipment that controls them also increases, vaporization equipment is becoming more complex and time-consuming, resulting in less maintenance. will also increase.

Figure 1 shows a typical flow of LNG cold thermal power generation using the Rankine cycle. In the figure, 1 is a secondary medium condenser, 5 is a pump, 3 is a preheater, 4 is a secondary medium vaporizer,
5 is a secondary medium turbine, 6 is a natural gas superheater, 7 is a natural gas turbine, 8 is a reheater, 9 is an afterheater, and 10 is a starter.

The present invention solves the problems of the conventional equipment described above and provides an LNG direct generation vaporizer that recovers the low-temperature vaporization heat of LNG as electricity with simple equipment.
An LNG direct power generator is obtained, which is configured so that a thermoelectric power generating element is attached to the outer heat transfer surface portion of a G oven rack vaporizer.

As described above, the present invention is a heat exchanger that directly generates power at the same time as the LNG vaporization by using low-temperature vaporization, which eliminates insects, in which LNG is vaporized at the consumption site.

Alternatively, the invention will be explained by means of the drawings.

Figure 2 is a flow diagram when using the LNG lα catapulted city vaporizer of the present invention, vJa diagram I'i used in the present invention □
be done. Figure 4 is an explanatory diagram of the element, and Figure 4 is a front view of the thermoelectric generator of the present invention attached to the heat transfer surface of a conventional ORV. )1rfi
It is a side view of ta).

First, I will explain Tsubame Electric Genden and Tetsuko.

As shown in Figure 4i1, this one is made by joining one end of the p411M semiconductor 14 and the nA semiconductor 13.
When the junction part of the semiconductor is heated and the other end is cooled, the holes, which are charge carriers of the P-type semiconductor 14, are active in thermal motion on the high temperature side, so rAf is transferred to the low temperature ill by swallow expansion.

positive charge is accumulated at the low temperature end. A similar phenomenon occurs in the n-type semiconductor 13, and negative charges of -L are accumulated at the low temperature end. Therefore, a starting force is generated at both low temperature ends.

As shown in FIGS. 4A and 4B, the present invention has a configuration in which a thermoelectric power generation element 15 is attached to the outer heat transfer surface portion 18 of a conventional LNG open rack vaporizer (ORV).

In this configuration, like a normal ORV, the LNG that has entered the lower header 16 receives heat from the seawater on the heat transfer surface section 18 while rising inside the ORV, and is vaporized and transferred to the upper header 17.
It comes out as natural gas (.

The heat transfer surface 18 on the outside of the ORV allows seawater to evaporate, and this seawater flows in the form of a film. The temperature on the seawater side is room temperature, and O
The LNG inside the RV has a temperature of about -160 at its lowest temperature.
It is °C. Thermoelectric power generator 2nd generation 1 attached to the heat surface
5 generates electricity due to this temperature difference.

The effects of the present invention are as follows.

(1) The equipment configuration is simpler than conventional LNG cold power generation using the Rankine cycle. That is, if there is an LNG direct power generation electrifier of the present invention and a DC-AC converter as necessary, the turbine and Rankine.

Power can be generated without the need for cycle pumps, Rankine cycle heat exchangers, etc. Also, the LNG control method is simple 7Z.
Since it can be the same as ORV, i7i'j can be simply done.

Maintenance is easy as it does not require pumps, etc.

[Brief explanation of drawings]

Figure 1 is a flow diagram of a typical example of LNG cold power generation using the Rankine cycle, Figure 2 is a flow diagram of a typical example of LNG cold power generation using the Rankine cycle;
The figure shows PAIii, an explanatory diagram of the principle of the L element, and a diagram showing the principle of the L element. (b) is a side view of fa). In the figure, 1-... Φ selective medium condenser 7... natural gas turbine 2-*'am pump 8...- reheater 3...
-Chi Swallow -Use 9...After Swallow 4...Secondary medium vaporizer -10-War/fist power generation Iso 5e...Secondary medium turbine 11...LNG IM contact photovoltaic power generation Vaporizer according to the present invention) 6-...Natural gas superheater 12...DC-AC converter 13...11 type semiconductor 14...P type semiconductor 15...Thermoelectric power generating element 16・0e lower header 17...0 upper header 18...heat transfer surface part 19...i″iσ water sprinkling ttq permission 1≦!1゛1 person Ishiyojima j'J IJ City Industry Co., Ltd. Agent: Yoshi Shirakawa, Direct Reform, Page 7, No. 3, $lf-Figure (tx,) (b)

Claims (1)

[Claims] +11 The outer heat transfer surface of an open rank vaporizer for LNG is attached to the heat exchanger element.